@misc{indiciaeddf2d22a55a0,
  title = {Coal resources of the Lakhra and Sonda coal fields, southern Sind Province, Pakistan; a progress report},
  author = {S. P. Schweinfurth and J.R. SanFilipo and E.R. Landis and R.A. Khan and A.A. Shah},
  year = {1990},
  doi = {10.3133/ofr9059},
  url = {https://pubs.usgs.gov/publication/ofr9059},
  note = {Source identifier: ofr9059}
}